1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.05, inclusive. The reporting person undertakes to provide to MasTec, Inc. ("MasTec"), any security holder of MasTec or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.

2. The options vested in equal installments on October 18th of 2005 and 2006.

By: s/ Alberto de Cardenas For: C. Robert Campbell

12/05/2012

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).